Pen



FIG. 1 is a Perspective view of a pen showing my new design;

FIG. 2 is a Front view thereof;

FIG. 3 is a Back view view thereof;

FIG. 4 is a Left side view thereof;

FIG. 5 is a Right side view thereof;

FIG. 6 is an enlarged top plan view thereof;

FIG. 7 is an enlarged bottom plan view thereof; and,

FIG. 8 is an enlarged detail view of the pen point, shown without the rest of the pen or the cap for convenience. 

CLAIM The ornamental design for a pen, as shown and described. 